BLACKSBURG, Va. - The gunman suspected of carrying out the Virginia Tech massacre that left 33 people dead was identified Tuesday as an English major whose creative writing was so disturbing that he was referred to the school's counseling service.

News reports also said that he may have been taking medication for depression, that he was becoming increasingly violent and erratic, and that he left a note in his dorm in which he railed against ''rich kids," ''debauchery" and ''deceitful charlatans" on campus.

Cho Seung-Hui, a 23-year-old senior, arrived in the United States as boy from South Korea in 1992 and was raised in suburban Washington, D.C., officials said. He was living on campus in a different dorm from the one where Monday's bloodbath began.

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Police and university officials offered no clues as to exactly what set him off on the deadliest shooting rampage in modern U.S. history.

''He was a loner, and we're having difficulty finding information about him," school spokesman Larry Hincker said.

Professor Carolyn Rude, chairwoman of the university's English department, said she did not personally know the gunman. But she said she spoke with Lucinda Roy, the department's director of creative writing, who had Cho in one of her classes and described him as ''troubled."

''There was some concern about him," Rude said. ''Sometimes, in creative writing, people reveal things and you never know if it's creative or if they're describing things, if they're imagining things or just how real it might be. But we're all alert to not ignore things like this."

She said Cho was referred to the counseling service, but she said she did not know when, or what the outcome was. Rude refused to release any of his writings or his grades, citing privacy laws.

The Chicago Tribune reported on its Web site that he left a note in his dorm room that included a rambling list of grievances. Citing unidentified sources, the Tribune said he had recently shown troubling signs, including setting a fire in a dorm room and stalking some women.

ABC, citing law enforcement sources, reported that the note, several pages long, explains Cho's actions and says, ''You caused me to do this."
Investigators believe Cho at some point had been taking medication for depression, the Tribune reported.

The rampage consisted of two attacks, more than two hours apart - first at a dormitory, where two people were killed, then inside a classroom building, where 31 people, including Cho, died after being locked inside, Virginia State Police said. Cho committed suicide; two guns were found in the classroom building.

One law enforcement official said Cho's backpack contained a receipt for a March purchase of a Glock 9 mm pistol. Cho held a green card, meaning he was a legal, permanent resident, federal officials said. That meant he was eligible to buy a handgun unless he had been convicted of a felony.

Investigators stopped short of saying Cho carried out both attacks. But ballistics tests show one gun was used in both, Virginia State Police said.

And two law enforcement officials, speaking on condition of anonymity because the information had not been announced, said Cho's fingerprints were found on both guns. The serial numbers on the two weapons had been filed off, the officials said.

Col. Steve Flaherty, superintendent of the Virginia State Police, said it was reasonable to assume that Cho was the shooter in both attacks but that the link was not yet definitive. ''There's no evidence of any accomplice at either event, but we're exploring the possibility," he said.

Officials said Cho graduated from a public high school in Chantilly, Va., in 2003. His family lived in an off-white, two-story townhouse in Centreville, Va.

''He was very quiet, always by himself," neighbor Abdul Shash said. Shash said Cho spent a lot of his free time playing basketball and would not respond if someone greeted him. He described the family as quiet.

Virginia Tech Police issued a speeding ticket to Cho on April 7 for going 44 mph in a 25 mph zone, and he had a court date set for May 23.
South Korea expressed its condolences, and said it hoped that the tragedy would not ''stir up racial prejudice or confrontation."

''We are in shock beyond description," said Cho Byung-se, a Foreign Ministry official handling North American affairs.

A memorial service was planned for the victims Tuesday afternoon at the university, and President Bush planned to attend. Gov. Tim Kaine was flying back to Virginia from Tokyo for the gathering.

Classes were canceled for the rest of the week.

Many students were leaving town quickly, lugging pillows, sleeping bags and backpacks down the sidewalks.

Jessie Ferguson, 19, a freshman from Arlington, left Newman Hall and headed for her car with tears streaming down her red cheeks.

''I'm still kind of shaky," she said. ''I had to pump myself up just to kind of come out of the building. I was going to come out, but it took a little bit of 'OK, it's going to be all right. There's lots of cops around."'

Although she wanted to be with friends, she wanted her family more. ''I just don't want to be on campus," she said.

The first deadly attack was at the dormitory around 7:15 a.m., but some students said they didn't get their first warning about a danger on campus until two hours later, in an e-mail at 9:26 a.m., around the time the second attack began.

Two students told NBC's ''Today" show they were unaware of the dorm shooting when they walked into Norris Hall for a German class where the gunman later opened fire.

The victims in Norris Hall were found in four classrooms and a stairwell, Flaherty said. Cho was found dead in one of those classrooms, he said.
Derek O'Dell, his arm in a cast after being shot, described a shooter who fired away in ''eerily silence" with ''no specific target - just taking out anybody he could."

After the gunman left the room, students could hear him shooting other people down the hall. O'Dell said he and other students barricaded the door so the shooter couldn't get back in - though he later tried.

''After he couldn't get the door open he tried shooting it open ... but the gunshots were blunted by the door," O'Dell said.

Virginia Tech President Charles Steger emphasized that the university closed off the dorm after the first attack. He said that before the e-mail was sent, the university began telephoning resident advisers in the dorms and sent people to knock on doors to warn them.

''We can only make decisions based on the information you had at the time. You don't have hours to reflect on it," Steger said.

Until Monday, the deadliest shooting in modern U.S. history was in Killeen, Texas, in 1991, when George Hennard plowed his pickup truck into a Luby's Cafeteria and shot 23 people to death, then himself.

Previously, the deadliest campus shooting in U.S. history was a rampage that took place in 1966 at the University of Texas at Austin, where

Charles Whitman climbed the clock tower and opened fire with a rifle from the 28th-floor observation deck. He killed 16 people before he was shot to death by police

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